Journal
PHYSICAL REVIEW LETTERS
Volume 128, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.128.128001
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Funding
- European Research Council under the European Union [739964]
- Marie Skodowska-Curie Grant [847413]
- PRACE [16DECI0017 RADOBI]
- PMW programme of the Minister of Science and Higher Education in the years 2020-2024 [5005/H2020-MSCA-COFUND/2019/2]
- CINECA Computational Grant ISCRA-C IsC83- SDROMOL under the ISCRA initiative [HP10CZXK6R]
- Foundation for Polish Science [POIR.04.04.00-00-26C7/16-00]
- Marie Curie Actions (MSCA) [847413] Funding Source: Marie Curie Actions (MSCA)
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This study reports new dynamical modes in confined soft granular flows, which have no counterpart in continuum viscous fluids. The emergence of these new modes is a result of the propagation of chaotic behavior of individual grains to the entire system. The study reveals the formation and breakage of stable jets and a non-Gaussian distribution of cluster sizes.
We report new dynamical modes in confined soft granular flows, such as stochastic jetting and dripping, with no counterpart in continuum viscous fluids. The new modes emerge as a result of the propagation of the chaotic behavior of individual grains-here, monodisperse emulsion droplets-to the level of the entire system as the emulsion is focused into a narrow orifice by an external viscous flow. We observe avalanching dynamics and the formation of remarkably stable jets-single-file granular chains-which occasionally break, resulting in a non-Gaussian distribution of cluster sizes. We find that the sequences of droplet rearrangements that lead to the formation of such chains resemble unfolding of cancer cell clusters in narrow capillaries, overall demonstrating that microfluidic emulsion systems could serve to model various aspects of soft granular flows, including also tissue dynamics at the mesoscale.
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